Surely there are a hundred sets of these things in club members' basements.
I just remembered I have some of unknown dia. (silvers) in my spares. If you strike out and you're not in a big hurry, I'll dig them out in a few days and check.
Ken
Are you looking for the (aluminum?) metal caps from the 1st gen SC wheels? If so, I have a few.
If you don't mind looking, I'd appreciate it.